
ARROW ALL IN® mixtures with broadleaf herbicides

There is increasing interest in clethodim products, like ARROW ALL IN®, due to the more traditional ‘fop’ based graminicides not being able to control volunteer corn plants from PowerCore® Enlist® genetics, and given that clethodim experiences less antagonism if mixed with Enlist® herbicide (2,4-D choline). And while a lot of attention has focused on how clethodim products can help in production systems with herbicide tolerant genetics, ARROW ALL IN® can also bring valuable weed control to growers of non traited beans (ie. IP soybeans or dry beans).
A challenge for all graminicides, dims or fops, is that efficacy can drop when mixed with broadleaf control partners, particularly those that have ‘burning’ activity (ie. fomasafen or bentazon). Such products do not control grassy weeds, but can damage the cuticle. Getting clethodim to pass through the cuticle is challenging (hence the importance of adjuvants), and when the cuticle is damaged sub optimal uptake of the ai is possible1.
Given this, mixing ARROW ALL IN® with broadleaf herbicides (those not part of a herbicide tolerance system) is not recommended. Splitting the applications is the best course of action. If the broadleaf herbicide is applied first, the application of ARROW ALL IN® should be delayed until the cuticle has had a chance to heal. Applying ARROW ALL IN® followed by the broadleaf herbicide can reduce the time between applications, however broadleaf weeds are easier to kill when small (and grow fast!), so agronomically it is most logical to target the broadleaf weeds first.
For more information on ARROW ALL IN® please visit our website below. If any specific questions on how ARROW ALL IN® can fit into a production system, herbicide tolerant or otherwise, please reach out.
ARROW ALL IN®: ARROW ALL IN® | ADAMA East Canada
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Cited Literature: 1 Grass Control in Soybean (Glycine max) with Graminicides Applied Alone and in Mixtures on JSTOR